With the release of Disclosure Day, Steven Spielberg’s new film about aliens, a question as old as science fiction itself resurfaces: if aliens were to arrive on Earth, would they come to conquer us, ...

There’s no data to suggest that aliens exist. However, if we believed they existed and came to Earth, our planet would offer them a somewhat risky buffet. There is liquid water, as well as salts, ...

With 'Disclosure Day,' the director returns to a longtime preoccupation. Two Times staffers explore his ongoing fascination with extraterrestrials.

Should we prepare for alien invasion? That question has gained new urgency with the appearance of interstellar visitor 3I/ATLAS.